diff --git a/README.md b/README.md
index efde2cb..f6b8301 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,6 @@
 4 + 61 = 65
 2 - 54 = -52
 75 - 59 = 16
-13 + 18 = 31
 54 + 100 = 154
 29 / 5 = 5
 37 + 70 = 107